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Suprapatellar pouch
The suprapatellar pouch (suprapatellar recess) is the extension of the knee joint cavity above the patella (kneecap). Page updated January 2024 by Dr Sheila Strover (Clinical Editor)
Surface replacement
A surface replacement involves an implant usually used on the surface of the condyles (end of the femur) or for the damaged kneecap and groove in which the kneecap (patella) runs.
SVF
SVF is an abbreviation of Stromal Vascular Fraction.
Swelling
Swelling of the whole knee or a region of the knee is typically a result of an accumulation of fluid.
Sympathetic nervous system
The sympathetic nervous system is the nerve system that controls things like heart rate and blood pressure.
Symptom
A symptom is a discomforture felt by the patient - for example pain, giving way, catching.
Syndrome
A syndrome is a collection of signs and symptoms often found in association with one another.
Synovectomy
Synovectomy is a surgical procedure to remove excessive joint lining (synovium). Page updated March 2024 by Dr Sheila Strover (Clinical Editor)
Synovial chondromatosis
Synovial chondromatosis is a rare disorder where the joint lining (synovium) proliferates and produces a benign proliferation of synovial tissue and bits of cartilage.
Synovial fluid
Synovial fluid is the fluid lubricating the inside of any synovial joint, and it is secreted by the synovium (the cells of the joint lining).